Level.



J. SCHMID.

LEVEL.

APPLICATION FILED MAR.30, 1914.

Patented Apr. 6, 1915.

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THE MORRIS PETERS CO..PHoTc-LlTHuwA: r1|NGrON, D. C.

JACOB SCHMID, OF DETROIT, MICHIGAN.

LEVEL.

Specification of Letters latent.

Patented Apr. 6, 1915.

Application led March 30, 1914. Serial No. 828,161.

T0 all whom t may concern Be it known that l, JACOB SCHMID, a citizen of the United States of America, residing at Detroit, in the county of Wayne and State of lllichigan, have invented certain new and useful lmprovements in Levels, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to levels, and the objects of my invention are, first, to furnish a level with a plurality of level glass units that can be adjusted and correctly positioned to permit of the level being used in various positions; second, to provide a level glass unit consisting of parts that can be assembled to retain the unit in engagement with a frame or other support, and third, to accomplish the above by a simple, durable and inexpensive mechanical construction that will be hereinafter specifically described and then claimed.

Reference will now be had to the drawing, wherein- Figure 1 is a side elevation of the level; Fig. 2 is an edge view of a detached level glass unit; Fig. 3 is an elevation of one of the parts of the level glass unit; Fig. l is a similar view of the other part of the level glass unit; Fig. 5 is an enlarged cross sectional view taken on the line V-V of Fig. l; Fig. 6 is an end view of the level; Fig. 7 is an enlarged cross sectional view taken on the line Vl-VI of Fig. 1; Fig. 8 is an enlarged longitudinal sectional view of the level taken on the line VIII-VIII of Fig. 1, showing the level glass or tube in elevation, and Fig. 9 is a plan of a detached level glass or tube.

A level in accordance with this invention comprises an oblong metallic frame 1 having the topand bottom sides thereof connected by transverse ribs 2' and a central longitudinal web 3, which is provided with oblong openings e. The frame 1, intermediate the ends thereof and at points adjacent to the ends of said frame, is provided with cylindrical housings 5 in which are detachably mounted level glass units that are identical in construction, but are differently positioned whereby the level can be used in various positions.

Each level glass unitcomprises side plates 6 and 7 that are circular and have flanged eccentric openings 8 providing` seats for transparent circular protecting plates 9 that for a level glass 11 that has the central por- 4 tion thereof a greater diameter than the remaining portions of said glass. The tube forming the level glass tapers from the central portion thereof to the ends which eX- tend into openings 12 provided therefor in the lugs 10 and are held by a plaster of Paris or by other fastening means. The curvature or bulge of the tube or glass is such that the bubble therein can readily appear and move at either side of the tube or glass.

The lugs 10 extend between enlargements or protuberances 13 upon the inner side of the plate 7, thereby correctly positioning said plates to permit of the level glass 11 being observed through either of the protecting plates 9. To hold the plates 6 and 7 in proper relation and clamp the same in a housing 5, said housing is cylindrical and has the open ends thereof provided with circular seats 14 for the edges of the plates. The. inner side of the plate 7 has bosses or socket members 15 to receive screws 16 that extend through openings 17 in the plate 6, said screws having the heads thereof flush or countersunk in the outer side of the plate 6. Bv tightening the screws 16 the plates 6 and 7 are clamped in the housing 5 and can be positioned wherebv a level glass will he supported longitudinallv of the frame 1. as shown intermediate the ends thereof, or with level ,glass disposed transverselv of the frame. as shown at the ends thereof.

To permit of the central level glass heiner readilv observed from the top of the frame, said frame and the central housing have registering oblong openings 18.

rThe end housings and the weh 3 are provided with onenings 19 to permit of the end level glasses being observed and the ends of the frame 1 are further cut awav. as at 20, thus permitting of the end level ,glasses being observed from the ends of the frame.

Bv providing each unit with eccentric or off-set sight onenin gs there is sulicient clearance for the fastening means connecting the side plates of the unit and the manner of clamping the side plates together permits of a unit being clamped upon a block 21. a sou are or straight edge 9.2 or any other structure. In the first instance, the block 21 is clamped between the plates 6 and 7 and in the latter instance the straight edge 22 is clamped between the side plates 6 and the ends of the bosses or socket members 15. It V is to be understood that the structural kelevra5 ments are susceptible yof such varia-tions and modifications as fall within 1the sco-pe of the appended claims."

' VWhat I claim is: Y

1. The vcombination with a level frame and housings forming part thereof, of level glass units adjustably clampedin 4the housings of said frame, each unit comprising circulark side plates provided With Yeccentric fopenings, oppositely vdisposed lugsv carried bythe inner Vside of one ofsaid :pilates at diametrically opposed edges ofthe eccentric opening thereof, a level glasscarried bysaid flugs, socket members protruding .from the innerside of one Vof said plates, and screws .extending through the other side plate' into said members Qto detachablyvclamp said plate in engagement with .the `ends of ,the -housings o f said ,level frame. l

A level glass unit comprising circulark plates provided with eccentric openings, oppositely disposed lugs carried by the inner side of one ofr said plates at diametrically opposed edges of the eccentric opening thereof, enlargements forming part of the "inner side of the other plate and between which extend the ends of said lugs for main- -taining theeccentric openings of said plates in alinement, a level glass carried by `said lugs and intercepting the axis of said eccen- .tric openings, and means carried by said kplates and correctly positioned yby the inclamped in the seats in the ends of the hous- .ings of said framewhereby said level glass kunits can be positioned to be read through .either of the-sightvopenings of said hous-.V

ings, each .unit comprising circular Y.side

plates provided with openings, interlocking means between said plates for correctly positioning-one plate relative to the other, and

a level glassV supported by said locking` means.

In testimony whereof I VaiiiX my' signature in presence of two witnesses.

YJACOB SCHMID. Witnesses:

ANNAM. DORR, OTTO F. BARTHEL.

Cpfieii q! tslih pieten: maybe obtained.y flor've cents each, by'acrldressing the Commissioner of ratenfts. 1 Washingtony D. C. 

